/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.frank.loadinglibrary.utils.interpolator;


/**
 * @author eric_shaw
 * @version 1.0
 * @description 加速器
 * @classname AccelerateInterpolator.class
 * @program loadinglibrary
 * @date 2021/06/07
 **/
public class AccelerateInterpolator implements
        Interpolator {
    private final float valueOne = 1.0f;
    private final float mFactor;
    private final double mDoubleFactor;

    public AccelerateInterpolator() {
        mFactor = valueOne;
        mDoubleFactor = 2.0;
    }

    public AccelerateInterpolator(float factor) {
        mFactor = factor;
        mDoubleFactor = 2 * mFactor;
    }

    @Override
    public float getInterpolation(float input) {
        if (Float.valueOf(mFactor).equals(valueOne)) {
            return input * input;
        } else {
            return (float) Math.pow(input, mDoubleFactor);
        }
    }
}